Examples include a method for controlling an electric motor using a variable speed drive based on input parameters of the variable speed drive. The method uses initial estimated parameters of an electric motor and measurements of the variable speed drive at operating points of the electric motor to determine accurate input parameters of the variable speed drive.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The method according to claim 1, wherein the representation model comprises electrical or mechanical parameters of the electric motor.
3. The method according to claim 1, wherein the representation model is established based on a set of default parameters of the electric motor.
4. The method according to claim 3 wherein the set of default parameters comprises a parameter of a nameplate of the electric motor.
7. The method according to claim 1, wherein the estimated operating parameter and the real operating parameter are respectively an estimated vector and a real vector comprising several values and the operating difference corresponds to a difference between the norms of the estimated and real vectors.
8. The method according to claim 1, the method further comprising determining a performance value of the representation model based on the values of an electric command and on an operating difference determined at an operating point.
9. The method according to the above claim 8, the method comprising continuing the execution of the method when the performance value is below a determined threshold.
10. The method according to any of claims claim 1, the method further comprising controlling, by the variable speed drive, the electric motor based on a set of stored VSD parameters.
11. The method according to claim 1, wherein the set of VSD parameters comprises at least two of a stator resistance, a no-load current, a leakage inductance, a rotor time constant, a load torque and a motor inertia.
12. The method according to claim 1, wherein a type is assigned to the electric motor and wherein the method further comprises storing, in a remote server, an electric motor dataset comprising the determined set of VSD parameters, the type of the electric motor and a running time of the electric motor.
14. A non-transitory computer-readable storage medium comprising instructions which, when executed by a processor, cause the processor to carry out the method of claim 1.
15. A variable speed drive comprising a processor adapted to control an electric motor according to the method of claim 1.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
December 8, 2021
May 9, 2023
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